Why wont my monte start

Was driving on highway when all the sudden i felt what i thought was a tranny slip so i eased off the gas but then my engine dies completely. i try to start it and it sounds like it wants to turn but wont. i scanned it and was given 3 codes, 2 po420's and a po442. these codes i thought were for exhaust issues would they really make my engine die?

420 is for the catalytic convert. Below threshold. Driving for a while (not like a week, maybe 6 months or so)on this code could kill the engine. What happens is the cat will get clogged up or could just melt from to much heat. Easiest way to check is to remove the first 02 sensor and start it . If it starts, replace the catalytic convert. 442 is a small EVAP leak, this is fuel tank pressure and vacuum problems. Depending on the year of your car, newer models will shut down the engine. but will usually start back up after ten minutes or so. Small leaks are usually the gas cap. Either not being tightened down enough or look at the seal, if it is cracking from age replace the cap.

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Hey first thing you want to do is make sure its getting fuel .. Try shooting a little gas into the air cleaner and crank it and see if it starts .. if it does your fuel pump might be the problem .. or use a little either instead of gas either will let you know if its a fuel problem .. sounds like to me that might be what it is. holler if you need more and thanks Jerry

The PO441 has to do with your HO2S 2 (Oxygen sensor). You need to check to make sure the wire is not off of the sensor and check the grounds to the Oxygen sensor. Could be a bad Oxygen Sensor. The other code has to do with your Evap system Purge solenoid circuit. Has to do with detecting an improper voltage level. Could be a shorted Purge solenoid.

Sounds like fuel pump is going bad.Change fuel filter to make sure its not that.Then put a fuel pressure gauge on the schraider valve located on the fuel rail (its like the valve on your tire) to check if the pump is up to specs.(Make sure you have rags around to soke up any fuel spillage) With the gauge on have some one start the vehicle as normal and watch the gauge,if it drops below specs replace the pump .TIP:You can borrow a fuel pressure gauge from AutoZone and ask them the fuel pump p.s.i. spec on your vehicle.Free,free,free diagnosis!!!

If you dont have much money, guessing what parts to change gets expensive. First, you need to verify if it has fuel pressure and spark, that will lead you in the direction to start looking for the problem. Pull 1 spark plug wire off and see if it will jump a 1/2" gap, If so, thats good. If no spark, make sure the cam is turning, you may have a broken timingbelt.

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Related Questions:

that is a hum dinger, largest ever posted, in one shot.
very good.!
one word , the transmission slips. (never drive a slipping tranny)
overheat indicator.! that is key.
many newer cars will change the transmission shifting any time
the engine over heats.
and overheat wins over transmission , every time.
if the engine burns up, what good is any transmission.? nada.

solve overheat first.

slip or flare.
is when the engine RPM rises fast and the car dont go faster.
SLIPS.
and slipping burns up trannyclutchs and increases the damage. inside the transmission, dont do that. dont allow it,
park it and fix it.

on some tranny there is a temperature sensor that the TCM
watches and changes shift patterns based on AFT fluid temps.
and if the ATF fluid gets too hot , it takes actions. to keep the tranny from harm.

why not get a scan too and see what DTC errors there are..
DTC, engine overheate.
DTC< tranny overheat (caused by above)

what makes you thing the tires/wheels tighten (felt by hand off ground?)
my guess , you meant it seems. like???
1: lost engine power?
2: transmission not up shifting?

is this a auto A/T or manual M/T tranny,
if A/T , you need to look at the engine RPM when you lose
power (acceleration on demand)

RPM rises, car dont move faster ,this is tranny slip.
RPM fails to increase, and speed, up hills. this is called lost engine power.
lost engine power can be caused by , bad spark (tuneups skipped?)
or weak fueling.
weak fueling too can be cause by skipping the fuel filter step in the tune up list.

hot engine,cold or both>?quarts? who a quarts gauge, don't feel bad we had RCH , in the military. (xrated)wont move is always 1 of 2 things.1: engine stalled or almost no horse power (torque)2: tranny MALF!

find out which first.? #1 fact to know.for sure slush pump trannys that is always and issue.slips too much, or too little, not in any manual gear box.we know instantly when power is low (engine) every time.

my guess is engine power is near zero.is idle below normal (800 hot)?or too fast? idle?evidence we need that. to wax smarter.here is your first test:1; start car select drive,or L, and step on gas (right foot)2: does car move, sure no. but does RPM look right on engine.?when the tranny slips the RPM rise and car dont move.there is no longer a 1 for 1 relation ship engine to wheelsthis is slip or as tranny men call it FLARE.if you have no tachometer, then all this is hopless.never drive a A/T with no Tachometer.no way to communicate facts. see?i have one in my drawer here,just for this case.a mech, can do this by ear and is impossible to put in to words.

Some of these issues are unrelated. One thing to look at is the condition of the turn signal switch and the ignition switch. The low coolant light has a TSB from Chevy on the issue and it says to check and clean the sensor. The sensor is on the radiator and has to be removed. The sensor can become contaminated with engine oil, check for oil in the coolant if that is present then you need to find the source of the oil and correct the problem. This problem could be serious like a head gasket issue. That would explain the loss of power and the smell.

Hey first thing you want to do is make sure its getting fuel .. Try shooting a little gas into the air cleaner and crank it and see if it starts .. if it does your fuel pump might be the problem .. or use a little either instead of gas either will let you know if its a fuel problem .. sounds like to me that might be what it is. holler if you need more and thanks Jerry

I had the same problem driving along and had to coast over to the side of the road. 92000km. all the clutches in the tranny were gone and all kinds of filings in filter and pan. the tranny had to be rebuilt at dealer for $1895 canadian Sorry for this news I also thought it slipped into neutral and wouldn't move no matter where I put the shifter